From nobody Tue Feb 10 07:40:24 2026 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1A5118289C; Wed, 31 Jul 2024 06:25:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722407134; cv=none; b=IhUI6ZMVhUmxeEuu3sStR9HNRZq6vlGm8rdCmM7eEkkGVpZTYcIXABokOxl/97Fu3RW2iscU4EmmrNhth7ADS3jjAYLtBZX47jQtPT+sOvYgxoGiwf8jwnqlE7UOMw5Mrp62Qu2/nhnKJM8PYMfbCDWYjDqQmxOWL780b7caHCA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722407134; c=relaxed/simple; bh=VY5Sb68aQNAfC82SoknebxDDu2vIjufBgVDCn/uHZT4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Bx8YJ0tQzPb0OOWbEhi0fPsfJZPTHO1VWDCJvcrAqZWCVxKm4Mv7gNo7ZIgtFdExoqi/Pta6dEbggrBMV6RNWiCFzx8wXDNwNFD1QsnEXvpFvNs5vQYNuWtlS39YLZP+cxE8kf1uRae+kktmit2N8v4NS/pYFOUEejlpxh/dqBA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4WYhsh2ZVMz4f3kv8; Wed, 31 Jul 2024 14:25:12 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.112]) by mail.maildlp.com (Postfix) with ESMTP id 4E0311A1865; Wed, 31 Jul 2024 14:25:26 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.124.27]) by APP1 (Coremail) with SMTP id cCh0CgA3jE7T2KlmaFNcAQ--.8748S6; Wed, 31 Jul 2024 14:25:26 +0800 (CST) From: Kemeng Shi To: tytso@mit.edu, jack@suse.com Cc: linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 4/8] jbd2: remove unneeded kmap for jh_in->b_frozen_data in jbd2_journal_write_metadata_buffer Date: Wed, 31 Jul 2024 14:22:43 +0800 Message-Id: <20240731062247.2380440-5-shikemeng@huaweicloud.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20240731062247.2380440-1-shikemeng@huaweicloud.com> References: <20240731062247.2380440-1-shikemeng@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: cCh0CgA3jE7T2KlmaFNcAQ--.8748S6 X-Coremail-Antispam: 1UD129KBjvJXoW7tr47Zr47Xw4UGry7tFy7Jrb_yoW8Gw13pr 9a9rykKFyvqryqyr1kWan7ZrWjg3yDWFWUKFWDCa4ayFW3W3sFkr1jva1xK3WjyFZ7Jay8 XryqvFWxWwnIyrUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUvKb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV Cq3wA2048vs2IY020Ec7CjxVAFwI0_Gr0_Xr1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0 rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVW5JVW7JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267 AKxVWxJVW8Jr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAF wI0_GcCE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2 WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkE bVWUJVW8JwACjcxG0xvY0x0EwIxGrwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbV WUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF 67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42 IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF 0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxh VjvjDU0xZFpf9x07jeVbkUUUUU= X-CM-SenderInfo: 5vklyvpphqwq5kxd4v5lfo033gof0z/ Content-Type: text/plain; charset="utf-8" Remove kmap for page of b_frozen_data from jbd2_alloc() which always provides an address from the direct kernel mapping. Signed-off-by: Kemeng Shi Reviewed-by: Jan Kara --- fs/jbd2/journal.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 312c7575b54f..9c1ffb0dc740 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -352,12 +352,13 @@ int jbd2_journal_write_metadata_buffer(transaction_t = *transaction, done_copy_out =3D 1; new_folio =3D virt_to_folio(jh_in->b_frozen_data); new_offset =3D offset_in_folio(new_folio, jh_in->b_frozen_data); + mapped_data =3D jh_in->b_frozen_data; } else { new_folio =3D bh_in->b_folio; new_offset =3D offset_in_folio(new_folio, bh_in->b_data); + mapped_data =3D kmap_local_folio(new_folio, new_offset); } =20 - mapped_data =3D kmap_local_folio(new_folio, new_offset); /* * Fire data frozen trigger if data already wasn't frozen. Do this * before checking for escaping, as the trigger may modify the magic @@ -373,7 +374,8 @@ int jbd2_journal_write_metadata_buffer(transaction_t *t= ransaction, */ if (*((__be32 *)mapped_data) =3D=3D cpu_to_be32(JBD2_MAGIC_NUMBER)) do_escape =3D 1; - kunmap_local(mapped_data); + if (!jh_in->b_frozen_data) + kunmap_local(mapped_data); =20 /* * Do we need to do a data copy? --=20 2.30.0